indys maths

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Across
  1. 3. half of 100
  2. 6. a 2D shape with 4 sides
  3. 7. what is the top of fractions called
  4. 9. 2 factors make a what
Down
  1. 1. 959-889=
  2. 2. the opposite of multiplication
  3. 4. a 3D circle
  4. 5. what does + represent
  5. 8. what does-mean